#N-center {
    width: 100%;
    height: 800px;
    background-color: rgb(128, 210, 243);
}

.left, .right {
    margin-top: 100px;
    float: left;
    box-sizing: border-box;
}

.left {
    width: 20%;
    position: absolute;
    top: 300px;
    left: 80px;
    background-color: rgb(98, 207, 250);
    border: 4px inset dodgerblue;
}

.right {
    width: 65%;
    position: absolute;
    top: 300px;
    left: 400px;
    background-color: rgb(98, 207, 250);
    border: 4px inset dodgerblue;
}

#N-center ul {
    background-color: rgb(98, 207, 250);
}

#N-center ul li {
    border-radius: 18px;
    text-align: center;
    width: 150px;
    list-style-type: none;
    cursor: pointer;
    font-size: 24px;
    font-family: '华文新魏';
    margin: 30px 0;
    padding: 5px 0;
    background-color: rgb(98, 207, 250);
}

#N-center ul li:hover{
    color: gold;
    background-color: rgb(20, 180, 243);
}

.left img {
    width: 20px;
    height: 20px;
    background-color: rgb(98, 207, 250);
}

#N-center ul li:hover img{
    background-color: rgb(20, 180, 243);
}

.right p {
    display: none;
    padding-top: 20px;
    padding-right: 10px;
    padding-left: 10px;
    padding-bottom: 20px;
    font-size: 18px;
    line-height: 35px;
    text-indent: 2em;
    background-color: rgb(98, 207, 250);
}

.right p:nth-child(1) {
    display: block;
}